:root {
  --color-bg: #1a1d2e;        /* Gris oscuro suave (fondo principal) */
  --color-bg-alt: #222836;    /* Gris medio oscuro (secciones alternas) */
  --color-surface: #2a2e3e;   /* Superficie de tarjetas */
  --color-surface-soft: #303544; /* Superficie suave */
  --color-text: #f0f2f7;      /* Blanco muy suave (texto principal) */
  --color-text-soft: #b8bcc5; /* Gris claro (texto secundario) */
  --color-accent: #43d9b8;    /* Verde azulado premium (botones, detalles) */
  --color-accent-soft: #2fb299; /* Verde más suave */
  --color-border: #404656;    /* Borde gris medio */
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}


*,
*::before,
*::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background: radial-gradient(circle at top, #111729 0, #050710 45%, #02030a 100%);
  color: var(--color-text);
  line-height: 1.6;
}

/* Layout base */

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: linear-gradient(to bottom, rgba(5, 7, 16, 0.92), rgba(5, 7, 16, 0.8));
  border-bottom: 1px solid rgba(67, 217, 184, 0.18);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0;
}

.logo {
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #ffffff;
}

.main-nav a {
  color: var(--color-text-soft);
  text-decoration: none;
  font-size: 0.9rem;
  margin-left: 1.4rem;
  position: relative;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), #7cf6ff);
  transition: width 0.18s ease-out;
}

.main-nav a:hover {
  color: var(--color-text);
}

.main-nav a:hover::after {
  width: 100%;
}

/* Hero */

.hero {
  padding: 4.5rem 0 3.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: center;
}

.hero-text h1 {
  font-size: 2.3rem;
  margin-bottom: 1rem;
}

.hero-text p {
  color: var(--color-text-soft);
  max-width: 32rem;
  margin-bottom: 1.6rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

/* Hero visual */

.hero-visual {
  position: relative;
  min-height: 220px;
  border-radius: 1.2rem;
  background: radial-gradient(circle at 20% 0%, rgba(67, 217, 184, 0.35), transparent 55%),
              radial-gradient(circle at 80% 0%, rgba(124, 246, 255, 0.35), transparent 60%),
              var(--color-surface);
  border: 1px solid rgba(67, 217, 184, 0.28);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.7);
}

.hero-glow {
  position: absolute;
  inset: 12%;
  border-radius: inherit;
  background-image: linear-gradient(135deg, rgba(67, 217, 184, 0.14), rgba(14, 165, 233, 0.06));
  opacity: 0.8;
}

/* Botones */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color 0.16s ease,
    color 0.16s ease,
    transform 0.1s ease,
    box-shadow 0.16s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), #7cf6ff);
  color: #050710;
  box-shadow: 0 10px 30px rgba(67, 217, 184, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(67, 217, 184, 0.45);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: rgba(124, 246, 255, 0.45);
}

.btn-secondary:hover {
  background: rgba(124, 246, 255, 0.06);
  transform: translateY(-1px);
}

/* Secciones genéricas */

.section {
  padding: 3.2rem 0;
}

.section-alt {
  background: radial-gradient(circle at top, #111729 0, #050710 45%);
}

.section h2 {
  font-size: 1.7rem;
  margin-bottom: 0.4rem;
}

.section-intro {
  color: var(--color-text-soft);
  max-width: 32rem;
  margin-bottom: 2rem;
}

/* Soluciones */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--color-surface);
  border-radius: 0.9rem;
  padding: 1.4rem;
  border: 1px solid rgba(67, 217, 184, 0.12);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.55);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.7rem;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--color-text-soft);
}

/* Beneficios */

.benefits-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1.7fr);
  gap: 2.5rem;
  align-items: flex-start;
}

.benefits-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.benefit-item {
  background: var(--color-surface-soft);
  border-radius: 0.9rem;
  padding: 1.2rem;
  border: 1px solid rgba(35, 43, 63, 0.9);
}

.benefit-item h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.benefit-item p {
  margin: 0;
  color: var(--color-text-soft);
}

/* Proceso */

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

.step-card {
  position: relative;
  background: var(--color-surface);
  border-radius: 0.9rem;
  padding: 1.4rem 1.2rem 1.2rem 1.2rem;
  border: 1px solid rgba(67, 217, 184, 0.12);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: rgba(67, 217, 184, 0.16);
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 0.6rem;
}

/* Proyectos */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--color-surface);
  border-radius: 1rem;
  border: 1px solid rgba(67, 217, 184, 0.14);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.65);
  overflow: hidden;
}

.project-image {
  width: 100%;
  height: auto;
  display: block;
}

.project-card h3 {
  margin: 1.1rem 1.1rem 0.6rem;
}

.project-card p {
  margin: 0 1.1rem 0.7rem;
  color: var(--color-text-soft);
}

/* FAQ */

.faq-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.faq-item {
  background: var(--color-surface);
  border-radius: 0.9rem;
  padding: 1.2rem 1.4rem;
  border: 1px solid rgba(35, 43, 63, 0.9);
}

.faq-item h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.faq-item p {
  margin: 0;
  color: var(--color-text-soft);
}

/* Contacto / CTA final */

.section-cta {
  background: radial-gradient(circle at top right, rgba(67, 217, 184, 0.22), transparent 55%),
              var(--color-bg-alt);
}

.cta-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1.7fr);
  gap: 2.5rem;
  align-items: flex-start;
}

.contact-form {
  background: var(--color-surface);
  border-radius: 1rem;
  padding: 1.6rem 1.4rem;
  border: 1px solid rgba(67, 217, 184, 0.2);
  box-shadow: 0 22px 55px rgba(0, 0, 0, 0.7);
}

.form-row {
  display: flex;
  flex-direction: column;
  margin-bottom: 0.95rem;
}

.form-row label {
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
  color: var(--color-text-soft);
}

.form-row input,
.form-row select,
.form-row textarea {
  background: #050814;
  color: var(--color-text);
  border-radius: 0.55rem;
  border: 1px solid var(--color-border);
  padding: 0.6rem 0.7rem;
  font: inherit;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
  border-color: transparent;
}

.contact-direct {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--color-text-soft);
}

/* Footer */

.site-footer {
  border-top: 1px solid rgba(35, 43, 63, 0.9);
  padding: 1.4rem 0;
  background: #050710;
}

.footer-content {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-soft);
}

/* Responsive */

@media (max-width: 960px) {
  .hero-grid,
  .benefits-grid,
  .steps-grid,
  .projects-grid,
  .cards-grid,
  .cta-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3.5rem;
  }

  .hero-grid {
    gap: 2.4rem;
  }

  .steps-grid,
  .projects-grid,
  .cards-grid {
    gap: 1.3rem;
  }
}


/* Gradientes sutiles en fondos */
body {
  background: 
    radial-gradient(circle at 20% 80%, rgba(67, 217, 184, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(124, 246, 255, 0.06) 0%, transparent 50%),
    linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.hero {
  background: 
    radial-gradient(circle at 15% 30%, rgba(67, 217, 184, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 70%, rgba(124, 246, 255, 0.10) 0%, transparent 45%),
    linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.section-alt {
  background: 
    radial-gradient(circle at 25% 25%, rgba(67, 217, 184, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(124, 246, 255, 0.06) 0%, transparent 55%),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.section-cta {
  background: 
    radial-gradient(circle at top right, rgba(67, 217, 184, 0.20) 0%, transparent 50%),
    radial-gradient(circle at bottom left, rgba(124, 246, 255, 0.12) 0%, transparent 55%),
    linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-surface) 50%, var(--color-bg) 100%);
}

/* Gradiente sutil en tarjetas */
.card,
.project-card,
.step-card,
.faq-item,
.benefit-item {
  background: 
    linear-gradient(145deg, rgba(255, 255, 255, 0.015), transparent),
    var(--color-surface);
  border: 1px solid rgba(67, 217, 184, 0.15);
}

/* Efecto de elevación más sutil */
.card,
.project-card,
.step-card,
.faq-item,
.benefit-item,
.contact-form {
  box-shadow: 
    0 8px 32px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}


@media (max-width: 720px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .main-nav a {
    margin-left: 0;
    margin-right: 1rem;
  }

  .hero-text h1 {
    font-size: 1.9rem;
  }

  .benefits-list {
    grid-template-columns: 1fr;
  }
}